Yaesu: Unusually fast re-charging

AC8UO

Newbie
Joined
Dec 8, 2017
Messages
3
Location
East Lansing, MI
I used to have a Yaesu FT-60 in the past, which I bought new and no longer own, which came standard with a desk charger. Whenever I re-charged that transceiver, it used to take 10 or more hours to bring the transceiver up to full charge.

I recently bought a used Yaesu FT-60. Everything seems to be working properly on it. I also purchased a used Vertex Standard CD-47 desk charger for it, which the seller described as the original and working properly. He also included the Vertex Standard 43B wall wart which came with it. (I understand Yaesu has changed the wall wart numerous times over the years including the 44B and other models).

When I received the transceiver, it had 8.4v on the screen whenever I turned it on. Then after using it for a couple of weeks it eventually got down to 5.5v and the battery symbol started blinking so I knew it was time for charging it.

Last night I plugged in the wall wart into the desk charger and put the transceiver in the slots and the red light came on, as is normal. To my surprise, 20 minutes later, the amber light came on which I believe means the transceiver is not seated correctly in the desk charger. Nothing had disturbed the desk charger so I was confused. I decided to unplug the desk charger, take the transceiver back out of it and re-seat the transceiver back into the seating slots. After that, I plugged the desk charger back in. The red light came on to indicate it was charging again. After another 25 minutes, the green light came on the desk charger. I was shocked. The process had only taken 45 minutes total. When I took the transceiver out of the desk charger and turned it on, the screen indicated 8.2v.

As I understand it, the original CD-47 desk charger was a trickle charger. I have some concerns that my transceiver charged so quickly. Do you think this has damaged my transceiver? Thanks in advance for any insights or recommendations you may have.
 

AC8UO

Newbie
Joined
Dec 8, 2017
Messages
3
Location
East Lansing, MI
The manual says on page 9 that it should take 10 hours to charge fully. I am using an original Yaesu charger, which was a trickle charger, not a rapid charger. When I had the same charger before, it used to take approximately 10 hours to fully charge, exactly as the manual indicates.

My concern involves the rapid rate of my most recent charging. Why should the charging (from 5.5v to 8.2v). be so much shorter than my charging in the past? (10 hours versus 45 minutes). Also, could such a rapid rate of charging hurt my transceiver? A ham buddy of mine who owns a different charger (the rapid one), says he can't even fully charge his FT-60 transceiver in such a short amount of time. He thinks something is not working correctly but he doesn't know if such an extreme, rapid rate of charging can hurt my transceiver or not.

I have been asked by fellow hams if my radio got hot during my last charging. It was cool to the touch after charging. All of them are as perplexed as I am. That is why I am inquiring for help and advice on this forum.
 

K4EET

Chaplain
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Joined
Feb 18, 2015
Messages
2,422
Location
Severn, Maryland, USA
If it is an older battery, the battery capacity may be a fraction of what a new battery would be. Like @pb_lonny said, how long does the battery last on a typical 90/5/5 (no carrier/receiving/transmitting) duty cycle? Does it last as long as your other HT’s battery?
 

wtp

Member
Joined
Apr 3, 2008
Messages
6,628
Location
Port Charlotte FL
yep, as batteries age, and the capacity goes down, they charge to the new full faster.
that is how you can tell they are past their prime.
 

SA4MDN

Member
Joined
May 10, 2017
Messages
65
like the charger manual says, in the link i posted, 1.5 to 3.5 depending on battery, and if your battery is not fully discharged it will be less time.
 

bharvey2

Member
Joined
Mar 12, 2014
Messages
1,964
As others have noted, the battery may be approaching the end of its life. One thing you might try though is to drop the battery into the charger without the radio attached (if it's possible) I've seen parasitic drain (current draw on the battery even when the radio is off) from radios affect how they battery behaves in the charger. Mind you, I don't own an FT-60 so I don't know if parasitic drain is present with those or not.
 

chief21

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Mar 2, 2004
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Summer - Western NC; Winter - Tampa Bay FL
I've seen similar behavior with some commercial handheld batteries. The battery voltage reads appropriately high, but the capacity of the battery (milliamps) has degraded, sometimes to the point where the battery can support RX, but just a few transmit cycles will cause the battery to discharge. Upon placing the battery in a charger, the charger will quickly bring the back voltage back to green, but adequate capacity is still lacking.
 

AC8UO

Newbie
Joined
Dec 8, 2017
Messages
3
Location
East Lansing, MI
I've seen similar behavior with some commercial handheld batteries. The battery voltage reads appropriately high, but the capacity of the battery (milliamps) has degraded, sometimes to the point where the battery can support RX, but just a few transmit cycles will cause the battery to discharge. Upon placing the battery in a charger, the charger will quickly bring the back voltage back to green, but adequate capacity is still lacking.
Thank you for all those who have sent suggestions. I have ordered two new batteries. You hams are the greatest.
 
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